This was just a little project to use Javascript.  
For accurate speed-vs-RPM data, see my S4 Gearing Plot page

Find Speed: (given RPM & Gear) RPM: Select RPM 1000 2000 3000 4000 5000 6000 7000 Gear: Select Gear 1st 2nd 3rd 4th 5th 6th Reverse Theoretical Speed: (mph) Speedometer Speed: (mph)

Find RPM: (given Speed & Gear) Speed: Select Speed 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 Gear: Select Gear 1st 2nd 3rd 4th 5th 6th Reverse Theoretical RPMs: Tachometer RPMs:

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